The selection of cosmetic packaging basically includes […]
The selection of cosmetic packaging basically includes five elements: product compatibility, seal integrity, barrier integrity, appearance appreciation, and physical properties in circulation. The integrity of the seal (that is, the air-tightness of the package) is particularly important because the active ingredients in most cosmetics are compounds that evaporate easily, and many natural ingredients simply change color and deteriorate when they touch the air. High-end brands choose vacuum packaging for more than just beauty. Many high-end brands of skin care products have very advanced formulations and have specific requirements for vacuum packaging, so they need the best protection.
The vacuum pump and the bottle body need to be simply drawn off, the liquid distribution amount is uniform and uniform, and the internal space is reduced with the reduction of the material body, which isolates the outside air from entering, and the packaging looks beautiful together. Customers can dispense the products in the package in any orientation and angle, realizing the use of 360 degrees without dead ends.
In practice, the vacuum pump and bottle system can be divided into three main categories.
1. Piston vacuum system
This system is the most widely used one of the existing vacuum pumps and bottle bodies. A piston is installed inside the bottle body, and a closed space is formed between the press head and the material is stored in this space. After pressing the vacuum pump press the head , To promote the vacuum situation in the space, use the outside atmospheric pressure to push the piston to move, and then distribute the material body through the liquid outlet of the vacuum pump. The key point of this skill lies in the cooperation between the piston and the bottle wall: the cooperation between the piston and the bottle wall should not be too tight or too loose. Too tight can cause the piston to be unable to move and the liquid cannot be pumped out. Therefore, it is limited by changes in packaging shape, and very regular packaging methods such as round or oval are common.
2. Hose vacuum system
This system is evolved on the basis of ordinary hoses, replacing the original cover with a vacuum pump head. After pressing the head of the vacuum pump, the vacuum condition inside the hose is promoted, the outer wall of the hose is compressed and deformed by atmospheric pressure, and then the discharge body is distributed through the liquid outlet of the vacuum pump. Because the hose wall is composite stretched by multiple layers of materials, it has a certain strength and requires relatively high suction and tightness of the vacuum pump head.
3. Inner vacuum system
This system can be said to be a combination of the above two, that is, it has a solid surface and a soft inner liner. The raw material of the liner can be PE or aluminum bag, etc. other processes. The method of distributing and discharging the material is similar to the hose vacuum system, so it is not described here.
Similar to the same result, there must be a desirable side to the existence of different vacuum system structures. Of course, each structure cannot be seen face to face and can adapt to infinitely changing application environments. Before determining the system structure of the vacuum pump and the bottle, it is necessary to do the relevant preliminary investigations, such as the viscosity of the material, the application environment, the compatibility with the material, and so on.